- The FreeBASIC compiler (fbc.exe) and the executables generated by it, need at least Windows 95 to run -- it was not tested in Windows 3.x with the Win32 system installed yet (??) .
- The msvcrt.dll (the Microsoft's C runtime library) must be present (note: it wasn't shipped with Windows 95, but it's installed by many applications and can be also downloaded at: Microsoft∞).
- The gfx routines will use DirectX 5.0 or later if found on the host system, otherwise they'll fall back on standard Win32 GDI which will work on any Windows system.
- Unicode wide strings (WSTRING's) only work in Windows NT/2000/XP/2003